Machine for rolling printing-plates.



J. S. DUNCAN. MACHINE FOR ROLLING PRINTING PLATES.

Patented Sept. 11, 1917.

3 SHEETS-SHEET 1.

J. S. DUNCAN. MACHINE FOR ROLLING PRINTING PLATES. APPLICATION FILEDAUG. 7. 191a.

Patented Sept. 11, 1917;

a SHEETS-SHEET 2.

J. S. DUNCAN. MACHINE FOR ROLLING PRINTING PLATES.

APPLICATION FILED AUG. 7, 19I6. 3,239,679, v

Patented Sept. 11, 1917.

3 SHEETS-SHEET 3.

I Ii

I III I I warren erase rarnrrr FFIE.

JOSEPH S. DUNCAN, OF CHICAGO, ILLINOIS, AS SIGNOIt TO ADDRESSOGRAPHCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MACHINE FOR ROLLING PRINTING-PLATES.

Specification of Letters Patent. Patented Se t. 11, 191'? Applicationfiled August 7, 1916. Serial N0. 113,66 5.

To all whom it mag concern:

Be it known that I, JOSEPH S. DUNCAN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Machines for RollingPrinting-Plates, of which the. following is a specification.

This invention relates to a machine for rolling printing plates havingcharacters struck up from the body of the plate.

Printing plates having characters struck up from the body of metalblanks have been made prior to my invention. These plates are usuallymade in machines equipped with cooperating punches and dies. The facesof the printing characters when so formed are more or less curved,particularly adjacent the edges so that sharply defined impressions cannot be obtained therefrom; Furthermore, owing to slight inaccuracies ofthe punches and dies and of the operating mechanism therefor some of thecharacters are higher than others and the plate does not present a planesurface.

It is an object of my invention to provide a machine for rapidly andeffectively reducing the faces of printing characters on a printingplate to a uniform plane.

A further object of my invention is the provision of a machine forrolling printing plates to provide the characters thereon with sharplydefined edges, whereby the printing quality of the plates is materiallyimproved.

Further objects and advantages of my invention will be apparent as it isbetter understood by reference to the following specification when readinconnectionwith the accompanying drawing, illustrating the preferredembodlment thereof, in which Figure 1 is a plan view of a machineaccordingto my invention; a i 1 Fig. 2 is an end elevationthe'reof; Fig.3 is section on the line 33 of Fig.1;

i Fig. 4 is a side elevation of themachine; 5 is a section on the line55. of Fig. 3, and

-.Fig. 6 Fig. 4.

, Referring to the drawings a suitable frame 1 is-provided to supportthe various partsof the mechanism and particularly the bed 2' (Fig.- 3)upon which the printing plates 3 are intermitt nt y and. successi e y psiw' is a section onthe line 6-6of' tioned by mechanism including dogs 4(Fig. 5) plvotally mounted in reciprocating bars 6 and normally held bysprings 7 in position to engage the edges of successive plates and thusadvance the plates when the bars 6 are reciprocated. The bars 6 areactuated by mechanism including a swinging member 8 p votally mounted at9 on the frame 1 and connected by a link 10 to a rocker 11 pivotallymounted at 12 on the frame 1 which is in turn connected by a link 13 tothe slide 14 carrying the reciprocating bars 6. The foregoing mechanismis similar in structure and mode of operation to the plate feedmechanism illustrated and described in the patent to Joseph S. DuncanNo. 764,660, July 12, 1904:, and is a well-known structure beingemployed in a machine commercially known as the Addressograph.

[A member 16 is adjustably secured by screws 17 to the support 15 and isprovided on its under face with a plate 18 extending laterallytherefrom. A carriage 19 is provided with rollers 20 engaging the uppersurface of the laterally extending edges of the plates 18, whereby thecarriage is supported in operative position. The carriage 19 is providedwithdepending arms 21 in which a pressure roller 22 is journaled and ananti-friction roller 23 having flanges 24% is supported on the arms 21between the pressure roller 22 and the lower face of the plate 18. Theplate 18 is provided with depressions 25 adjacent one end to receive theflanges 243 and the opposite end is cut away at 26, thepurposebeing toallow the pressure roller 22 to be lifted when the movement of thecarriage 19 is completed in either direction. During the rollingoperation the pressure roller 22 is spaced from the bed 2 a distanceequal to the desired height of the characters on the plate3 byengagement of the anti-friction roller 24: therewith and with the plate18.

The means for actuating the carriage 19 comprises a shaft 27 mounted insuitable bearm'gs 28 and provided at one end with a crank disk29. A link30 connects the crank dis'k29 to the carriage 19. Secured to theopposite end of the shaft 27 is a disk 31 having a pawl 32 (Fig. 6)pivotally mounted at 33 on one ofits faces. A spring 34 connected to apin 350n the pawl 32 and to a pin 36 on the disk 31 biases the pawl 82toward a member 37 loosely mounted 011 the shaft 27 and provided with apair of notches 38. A bevel pinion 39 is connected to andpreferablygformed integral with the member :37

and engages a bevelirack 40 on asegment'jzl pivotally mounted at 42 onthe support 15. A link 43 connects thesegment ll to the swinging member8.

.A member ts. (:Fig. 6.) isfpivotally mounted at 45 on a lug 6 dependingfireman arm l7 of the support 15 and is provided at its free end Witharoller 48 adapted to .engage notches 49 in the periphery of ,the disk31. A spring 50 connected tola pin 51 on the arm 4l7andtoa pin 52 ontheinember fi l biases the member toward the disk 31. A'plate 53 secured tothe member .44: is disposed iii the path cfa plunger '54 slidablysupported in a bifurcated extension .55 of the segment ell. A spring 56,disposedbetween thearins of the eXtensi0n'55 ,andengaging a pin57 on theplungertietnormfilly holds the plunger in the position indicated inFig.4. When thesegment l1 swingson its pivotto the limit of its travelthe plungei- 5 L resiliently engages the plate 53 .to force the roller48 into one. of the niotchesl?) when a half revolution of theshaft-2Thas been. v accomplished, thus positively prevent ing overthrow(of the shaft 27 The mode of operation of my invention willbe apparentfrom the following brief descriptionthereof. The printing platesB may befed from a magazine (not shown) and areadvanced intermittently andsuccessivelyto positionon the bed 2by operating the swingin g member 8,which maybe affo ot or handlever, or may be connected in any suitablemanner to a motor or other source of power. As the sivinging'..membe1 8is rocked to -the right, viewing Fig. 4,:the dogs 4 are withdrawn toengage the successive printing plates 3, leaving-a printing plate uponthe bed 2. Simultaneously the segment ll is rocked on its pivot rotatingthe pinionBQ and consequently the member 37 which, as indicated in Fig..6, is e nga-gedby the pawl 32011 .the diskfil. Thedisk .31 isconsequentlyrotated and the shaft 27 and crankldisk 29 moved through ahalf revolution, the carriage 19 being moved to the position indicatedin Fig. .2 tothe opposite endof thebed 2. The plateS on the hed 2 issubjected to pressure by the pressure roller 22 to reduce the charactersthereon {to agcommon plane and provide .nell defined edges on the ffacesof the characters. Upon return of the swinging member 8 :to itsnotmal'position, indicated .in }Fig. fl, the successive plate .3 isadvanced .to position .on the bed 2, the carriage.}l9, howeverpreinaining stationary. Upon-again actuating the swinging member .8 the carniage'19 is .operated in the reverse ;(lirection, subjecting the Plate 3 t0 Ps ur f' he pr ssure r l r 22 with the previously described -result.

sult.

"The carriage 19 moves across'the bed 2 in jected to pressure to obtainthe desired rel -he rapidity ivith Wlnchthe prlntingplates can betreated is greatly augmented "by "the operation described. F'Dhe facesof .;the l-charac t( e r s ,,on plates so treated are disposed in 'acommon plane and are provided With sharply :leti-ned.ed ges, so gthatthe best results are obtained when impressions are taken from theplates. hly machine elS simple in monstruction and rapid ,in operationand may be operated by relativelyunskilled persons.

. It will be ,appanentthat Yariouschanges may be made in the form,construction-and arrangement of tl 1e.;par;ts without, departing fromthe spiritand scope ofthe invention or sacrificing any ofitsanaterialadvantages, the dorm her-embefore described being merely ,apreferred embodiment thereof.

claim; v i a V r 1. In a machine of the, character described, thecombination (of a fixed deed; means for intermittently and successivelypositioningprinting plates having characters struck .up from the bodythereof :upon said bed, and means gfor automatically subj ecting saidplates ;to r'olling pressure when so positioned to reduce thetacesiolfltheeharacters thereon to a connnon plane.

In a machine of the character de v scribed, the combination of aiiixeelbed, means ,ior uiterin ttently and successively positioningprinting ;plates having characters struck nip {from the body thereofupon salol bed, a roller andwmeans for-automat cally-actuating sa droller-do s,ub ec tsaid plates to pressure. when. so positionedkto re; 7

duce the .i'aceso f the characters thereon tc a common plane. 1 I 4 r 3.In a machine .Qf :the characterf de scr'ibed," the combination of aifixe'd =bed,

.means fcr intermittently and successively pos tioning pr nt ng plateshaving :charac-I ters struck-up fit'rom the body thereof upon d eaircller, and means for/a t m te cally actuat ng saidiroller in oppos tethreeticns as suQccssiyeiplates{are so positioned to reduce the facesof-thegcharacters thereon to a mmon p1ane..

.4. In a Einachmeof the. character described; the combination of a bed,means ior' r'lagein opp'ositedirections across said becl when.successive :plates are positioned on said bed to subject saidplates :topressure 5. In a machine of the character described, the combination ofa bed, means for intermittently and successively positioning printingplates having characters struck up from the body thereof upon said bed,a rigid support above said bed, a carriage movable thereon, a presureroller supported on said carriage, an anti-friction roller on saidcarriage between said pressure roller and support, and means foractuating said carriage in opposite directions when successive platesare positioned on said bed to subject said plates to pressure by saidpressure roller.

6. In a machine of the character described, the combination of a fixedbed, means for intermittently and successively positioning printingplates having characters struck up from the body thereof upon said bed,a pressure roller movable over said bed and spaced therefrom a distanceequal to the desired height of the characters on said plate, and meansfor actuating said roller in opposite directions as successive platesare positioned above said bed including an operating member and anintermittent connection between said member and roller.

7. In a machine of the character described, the combination of a bed,means for intermittently and successively positioning prlnting plateshaving characters struck up from the body thereof upon said bed, acarriage movable over said bed, a pressure roller supported by saidcarriage and spaced from said bed a distance equal to the desired heightof the characters on said plates, and means for actuating said carriagein opposite directions as successive plates are positioned on said bed,including a shaft, a crank secured thereto, a link connecting said crankand carriage, an operating member, and an intermittent connectionbetween said operating member and shaft.

8. In a machine of the character described, the combination of a bed,means for intermittently and successively positioning printing platesbearing characters struck up from the body thereof upon said bed, acarriage movable over said bed, a pressure roller supported by saidcarriage and spaced from said bed a distance equal to the dc Copies ofthis patent may be obtained for sired height of the characters on saidplates, and means for actuating said carriage in opposite directionswhen successive plates are positioned on said bed, including a shaft, acrank secured thereto, a link connecting said crank and carriage, amember secured to said shaft and provided with a pawl, a member loose onsaid shaft and provided with notches adapted to be engaged by said pawl,a pinion loose on said shaft and connected to said vlast-mentionedmember, a pivoted segmental rack engaging said pinion, and means forrocking said rack.

9. In a machine of the character described, the combination of a bed,means for intermittently and successively positioning printing platesbearing characters struck up from the body thereof upon said bed, apressure roller movable over said bed and spaced therefrom a distanceequal to the desired height of the characters on said plate, means foractuating said roller in opposite V directions as successive plates arepositioned on said bed including an operating member and an intermittentconnection between said member and roller, and means for positivelylimiting the movement of said roller to prevent overthrow thereof.

10. In a machine of the character described, the combination of a bed,means for intermittently and successively positioning printing platesbearing characters struck up from the body thereof upon said bed, apressure roller movable over said bed and spaced therefrom a distanceequal to the desired height of the characters on said plate, means foractuating said roller in opposite directions as successive plates arepositioned on said bed including a shaft, a crank secured to said shaft,a link operatively connecting said crank and roller, an operating memberand an intermittent connection between said operating member and shaft,and means for limiting the rotation of said shaft at each successiveoperation thereof to prevent overthrow of said roller.

JOSEPH S. DUNCAN.

Witnesses:

WVM. O. BELT, M. A. KIDDIE.

five cents each, by addressing the Commissioner of Patents, Washington,D. C.

